CN101729014A - Converter in double-fed wind generating set - Google Patents
Converter in double-fed wind generating set Download PDFInfo
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- CN101729014A CN101729014A CN200810201690A CN200810201690A CN101729014A CN 101729014 A CN101729014 A CN 101729014A CN 200810201690 A CN200810201690 A CN 200810201690A CN 200810201690 A CN200810201690 A CN 200810201690A CN 101729014 A CN101729014 A CN 101729014A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a converter in a double-fed wind generating set, comprising a DSP control board and an FPGA module, wherein a digital filtering module in the FPGA module is connected with an AD signal acquisition module for carrying out AD sampling on voltage and current signals, and a digital quantity processing module in the FPGA module is connected with a DI/DO module for acquiring digital quantity inputs; the digital quantity processing module and the digital filtering module are bidirectionally connected with the DSP control board through a data interchange module in the FPGA module; and a network PWM output module and a rotor PWM output module in the FPGA module are respectively connected with a network converter and a rotor converter. The converter has the advantages that an FPGA is used for replacing a DSP, because the price of the FPGA is much lower than that of the DSP; and in addition, the FPGA is used as slave equipment of the DSP and is convenient and quick to communicate with the DSP.
Description
Technical field
The present invention relates to a kind of double-fed wind power generator group, relate in particular to the converter in this double-fed wind power generator group.
Background technology
Wind energy is a kind of regenerative resource of clean environment firendly, also is one of important means that solves energy problem.In recent years, the development of wind power generation constantly surmounts the development speed of its expection, is keeping the world to increase the status of the fast energy always.Along with the development of wind power technology, in order further to reduce wind power cost, wind turbine generator progressively develops towards the big capacity direction of separate unit.
The double-fed wind power generator group partly is made up of blade, wind energy conversion system, gear box, drive system, generator, converter, yaw system, pitch-variable system, long distance control system and master control system etc. usually.The effect of blade, wind energy conversion system is that wind energy is converted to mechanical energy, by drive system, by the gear box speedup, mechanical energy is passed to generator.Generator adopts double-fed asynchronous generator, thereby realizes the excitation of generator is controlled by the control of converter to the rotor-side electric current of generator, realizes the conversion of mechanical energy to electric energy, can realize the variable speed constant frequency control of wind turbine system simultaneously.Between cabin and the pylon yaw system is installed, makes the cabin aim at the direction of the wind comes from.Pitch-variable system when the wind speed overrate, is controlled wind energy conversion system rotating speed and power output usually, guarantees system mechanics and electrical safety.Master control system is wind turbine generator " brain ", finishes all working process of unit automatically by it, and the interface of man-machine interface and remote monitoring is provided.
This shows that the double-fed wind power generator group is a very complicated system.In the middle of whole double-fed wind power generator group, the converter of wind power system is one of them very crucial technology, also is one of technological core of double-fed wind generating.
The two pwm converters of two level voltage types are to be formed by connecting by dc bus by two identical two level voltage type three-phase PWM converters, and its English name is Back-to-Back PMWConverter.Because in the running of the AC excitation double-fed wind generator system of variable speed constant frequency, the frequent conversion of the operating state of two pwm converters, usually the state that no longer works in rectification or inversion with them is distinguished them, but be referred to as grid side converter and rotor-side converter respectively according to their position, as shown in Figure 1.
At the hardware main circuit design aspect, before grid side converter, the Boost inductance that is used for the electric capacity charging is designed to T type resonator filter structure, and filter capacitor plays reactive power compensation simultaneously to first-harmonic.Behind the rotor-side converter, the dU/dt filter is housed, be used for the voltage harmonic of filtering switching frequency annex.In addition; the rotor-side design has two phase inductances (Crowbar) device of bidirectional triode thyristor control switching; can protect dc bus capacitor at the Crowbar device that rotor-side installs additional, prevent that dc voltage is too high and puncture electric capacity; and the low-voltage when can be used for realizing external short circuit penetrates; guarantee stator side unit off-grid not under the low-voltage state in short-term; continuous service, the reliability of raising unit operation.Dc capacitor is equipped with the precharge loop, the dc capacitor precharge when being used for unit starting.
And at the software control system design aspect, Each performs its own functions for these two pwm converters.Wherein, the task of grid side converter mainly contains two, and the one, guarantee the input characteristics that it is good, promptly the waveform of input current is near sinusoidal, and harmonic content is few, and power factor meets the requirements.Because grid side converter can obtain adjustable power factor arbitrarily in theory, this also provides an approach for the power factor controlling of whole system; The 2nd, guarantee the stable of DC bus-bar voltage, the stable of DC bus-bar voltage is the prerequisite of two converter operate as normal, and this can realize by the effective control to input current.
In the running of speed-varying frequency constant dual feedback wind power generation system, owing to follow the trail of the needs of maximal wind-energy, the rotating speed of unit is among the variation constantly, also constantly changes for DFIG provides the power of the rotor-side converter input of slip power.For the grid side pwm converter, the load that becomes when the rotor-side converter is one, in some cases, may occur by absorbing more high-power to the more powerful load acute variation of feedback, and the variation of load can cause the fluctuation of DC side busbar voltage, thereby influence the runnability of two pwm converters, and then have influence on the performance and the safe operation of whole wind group of motors.In order further to improve the anti-load disturbance ability of grid side converter, satisfy the requirement of speed-varying frequency constant dual feedback wind power generation to rotor excitation current.In the grid side control system, generally adopt the control strategy of voltage, current double closed-loop, can improve the performance of the anti-load disturbance of grid side pwm converter effectively, guarantee the stable of DC bus-bar voltage.
In two pwm converters, the function of grid side converter is the stable of control DC bus-bar voltage and obtains good input performance, do not participate in the control to DFIG and even whole generating system directly.The control of DFIG and whole wind force generating system all realizes by the rotor-side converter.
The effect of rotor-side converter also is divided into two aspects, and the one, provide the electric current of excitation component to the rotor of DFIG, thereby can regulate the reactive power that the DFIG stator side is sent; The 2nd, the active power of being sent by the Current Control DFIG stator side of control DFIG rotor torque component, thus make DFIG operate on the best power curve of wind energy conversion system.
, reactive power meritorious to DFIG in order to realize effectively controlled, the control of rotor-side converter is that the basis is designed with the Mathematical Modeling of DFIG, adopt power, current double closed-loop, and the torque component and the excitation component of rotor current carried out decoupling zero, realize effective decoupling zero control of the meritorious and reactive power of DFIG by torque component and the excitation component of control rotor current, thereby realize two targets of speed-varying frequency constant dual feedback wind power generation system: maximal wind-energy is followed the tracks of and the reactive power adjusting.
This shows that the control board in the converter is the brain of converter, the function of converter will be realized by it.
As seen from Figure 1: general convertor controls plate mainly is made of two DSP, and wherein DSP1 realizes the major function of net side pwm converter: promptly keep dc voltage stable, input current is sinusoidal and the control input power factor; DSP2 then realizes the major function of rotor-side converter: by the rotor current of double feedback electric engine is controlled to reach the function that maximal wind-energy is followed the tracks of.Control board at first passes through the AD signal acquisition module to voltage, current signal carries out the AD sampling, and the DI/DO module is gathered some digital quantity inputs, control system module DSP1/2 is obtaining the processing of laggard line number word filtering of these data and digital quantity, handle the data that obtain and be used for algorithm computation, finish the control corresponding algorithm, wherein, some for example circuit breaker open, thereby the output of controlled quentity controlled variables such as pass returns to the DI/DO module again and realizes digital quantity output, simultaneously, the DSP module also generates pwm pulse is realized grid side converter and rotor-side converter respectively by the control to the turn-on and turn-off of IPM function.And DSP1/2 can finish by CAN bus or Ethernet the management of some peripheral hardwares.In addition, also need between these two DSP, realize exchanges data, to realize coordination control to whole system.Though this method has realized the controlled function of converter effectively, there are following two shortcomings:
1) cost of two DSP is higher relatively.
2) communication between two DSP is relatively complicated.
Summary of the invention
The technical issues that need to address of the present invention have provided the converter in a kind of double-fed wind power generator group, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: a DSP control board; Also comprise: the FPGA module; Digital filtering module in the described FPGA module connects the AD signal acquisition module of voltage, current signal being carried out the AD sampling, and the digital quantity processing module in the FPGA module connects the DI/DO module that some digital quantity inputs are gathered; Described digital quantity processing module is carried out two-way be connected by the data interaction module in the FPGA module with the DSP control board with digital filtering module; Net side PWM output module in the FPGA module links to each other with the rotor-side converter with grid side converter respectively with rotor-side PWM output module.
Compared with prior art, the invention has the beneficial effects as follows: replaced a DSP with a FPGA.Because FPGA is more a lot of than DSP low price, in industrialization process, just can save a large amount of costs like this, and stronger competitiveness is arranged; FPGA is as the slave unit of DSP in addition, and is quick with the DSP easy communication.In addition, because FPGA has 320 pins, modulus conversion chip, analog-digital chip, SD_CARD, 10M/100M second too peripheral hardware such as network interface, CAN controller can directly be connected on the FPGA, make the control board function more powerful.
Description of drawings
Fig. 1 is converter module figure in the prior art;
Fig. 2 is a module map of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As seen from Figure 2: the present invention includes: a DSP control board; Also comprise: the FPGA module; Digital filtering module in the described FPGA module connects the AD signal acquisition module of voltage, current signal being carried out the AD sampling, and the digital quantity processing module in the FPGA module connects the DI/DO module that some digital quantity inputs are gathered; Described digital quantity processing module is carried out two-way be connected by the data interaction module in the FPGA module with the DSP control board with digital filtering module; Net side PWM output module in the FPGA module links to each other with the rotor-side converter with grid side converter respectively with rotor-side PWM output module;
In described FPGA module, also comprise the peripheral hardware driver module that connects CAN bus or Ethernet.
The convertor controls plate that the present invention adopts mainly is made of a DSP and a FPGA.Control board at first passes through the AD signal acquisition module to voltage, current signal carries out the AD sampling, and the DI/DO module is gathered some digital quantity inputs, the FPGA module is obtaining the processing of laggard line number word filtering of these data and digital quantity, handle the data that obtain and pass to DSP by data communication, the data that DSP needing to obtain are finished the control corresponding algorithm by algorithm computation, generate each IPM ON time and conducting sequence, and obtain after ON time and the conducting sequence generating pwm pulse is realized grid side converter and rotor-side converter respectively by the control to the turn-on and turn-off of IPM function for FPGA, FPGA these data inverse-transmittings through the SVPWM algorithm.Equally, some for example the processing returned again through the DI/DO module of controlled quentity controlled variable such as circuit breaker open and close output realize digital quantity output.And can finish by FPGA by CAN bus or Ethernet the management of some peripheral hardwares.
The present invention has adopted a kind of wind-powered electricity generation converter adjustable plate that combines based on 32 floating number digital processing chips (DSP) and ultra-large field programmable gate array (FPGA), as shown in Figure 2.Mainly combine by 32 floating point DSPs and FPGA.Too network interface, CAN controller, photoelectric encoder input circuit, the input of 10 road PWM optical fiber, 8 groups of outputs of difference PWM optical fiber, WatchDog circuit, 16 road photoelectricity are isolated auxiliary external equipments such as imput output circuit also to comprise 24 tunnel 16 modulus conversion chips, 4 tunnel 12 figure place mould conversion chips, SD_CARD, 10M/100M second.All circuit are integrated on one 6 layer printed circuit board; Can carry out the CPU of the digital processing chip DSP of 32 floating point arithmetics as wind-powered electricity generation converter adjustable plate, its 20 bit address bus and 32-bit number bus have constituted the parallel bus of adjustable plate, and the device that hangs on this bus comprises ultra-large field programmable gate array FPGA; Wherein FPGA is as the main devices of adjustable plate, by 6 analog-digital chip AD7656 of logic control, to 24 road aanalogvoltages, current signal carries out the AD conversion, transformation result is through being stored in the internal register behind the second order filter by programming constructs in the FPGA, DSP reads the AD transformation result by 20 bit address buses and 32-bit number bus, and in DSP, calculate, obtain needed conducting vector of space vector algorithm (SVPWM) and corresponding ON time, DSP still writes conducting vector and corresponding ON time in the SVPWM generator that programming constitutes in the FPGA by parallel bus, sends the IPM triggering signal by FPGA according to count value; DSP and FPGA are as two main devices of adjustable plate, finished the major function of wind-powered electricity generation converter adjustable plate, DSP linked to each other by parallel bus with FPGA and carry out function and divide, finish AD conversion, DA conversion, DI/DO control by FPGA, 16 DI input signals are isolated the device node that reads in outside the adjustable plate by photoelectricity, and 16 DO output signals are by the outer node of photoelectricity isolated controlling adjustable plate.FPGA also realizes carrying out communication with plate miscellaneous equipment outward simultaneously, comprises 10M/100M second too Netcom's news, CAN communication and three kinds of modes of RS232/RS485 standard asynchronous serial communication.DSP mainly finishes control algolithm, and the exchanges data between them is finished by DSP EMIF mouth 20 bit address buses and 32-bit number bus.
Because FPGA is more a lot of than DSP low price, in industrialization process, just can save a large amount of costs like this, makes our control board that stronger competitiveness be arranged.FPGA is as the slave unit of DSP in addition, and is quick with the DSP easy communication.In addition, because FPGA has 320 pins, modulus conversion chip, analog-digital chip, SD_CARD, 10M/100M second too peripheral hardware such as network interface, CAN controller can directly be connected on the FPGA, make the control board function more powerful.
Claims (2)
1. the converter in the double-fed wind power generator group comprises: a DSP control board; It is characterized in that also comprising: the FPGA module; Digital filtering module in the described FPGA module connects the AD signal acquisition module of voltage, current signal being carried out the AD sampling, and the digital quantity processing module in the FPGA module connects the DI/DO module that some digital quantity inputs are gathered; Described digital quantity processing module is carried out two-way be connected by the data interaction module in the FPGA module with the DSP control board with digital filtering module; Net side PWM output module in the FPGA module links to each other with the rotor-side converter with grid side converter respectively with rotor-side PWM output module.
2. the converter in the double-fed wind power generator group according to claim 1 is characterized in that: also comprise the peripheral hardware driver module that connects CAN bus or Ethernet in described FPGA module.
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| CN200810201690A CN101729014A (en) | 2008-10-24 | 2008-10-24 | Converter in double-fed wind generating set |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931240A (en) * | 2010-08-26 | 2010-12-29 | 哈尔滨九洲电气股份有限公司 | Double-PWM vector control double-fed wind power converter |
| CN101951167A (en) * | 2010-08-26 | 2011-01-19 | 哈尔滨九洲电气股份有限公司 | PWM controller of doubly-fed wind power converter |
| CN102394498A (en) * | 2011-10-11 | 2012-03-28 | 国电联合动力技术有限公司 | Singlechip digital filtering device for voltage measurement of double-fed wind farm |
| CN102510092A (en) * | 2011-12-19 | 2012-06-20 | 国网电力科学研究院 | Distributed real-time control unit of wind power converter |
| CN102624016A (en) * | 2012-03-15 | 2012-08-01 | 华中科技大学 | Bidirectional energy flowing flow battery energy storage grid connection device and control method thereof |
| CN102938565A (en) * | 2012-09-28 | 2013-02-20 | 上海交通大学 | Large-scale parallel system-based distributed communication system and control method thereof |
| CN103973130A (en) * | 2014-05-13 | 2014-08-06 | 上海电机学院 | Rectification and inversion module of doubly-fed converter of integrated structure |
| CN105429476A (en) * | 2015-11-20 | 2016-03-23 | 北京理工大学 | Multi-level switching linear composite piezoelectric ceramic driving power supply |
| CN106253694A (en) * | 2015-06-03 | 2016-12-21 | 新能动力（北京）电气科技有限公司 | A kind of modular electric energy converting means |
| CN107546741A (en) * | 2017-09-01 | 2018-01-05 | 中电普瑞科技有限公司 | A kind of low-voltage network power quality controlling device general purpose controller |
| CN107872090A (en) * | 2016-09-27 | 2018-04-03 | 南京南瑞继保电气有限公司 | A kind of energy-storage battery pre-charge circuit and pre-charge method |
| CN108900079A (en) * | 2018-06-20 | 2018-11-27 | 湖南理工学院 | A kind of rapid transmission method of inverter and machine switching signal |
| CN115833547A (en) * | 2023-02-08 | 2023-03-21 | 西南交通大学 | Decoupling circuit suitable for wide-band pulse load and control method |
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2008
- 2008-10-24 CN CN200810201690A patent/CN101729014A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951167A (en) * | 2010-08-26 | 2011-01-19 | 哈尔滨九洲电气股份有限公司 | PWM controller of doubly-fed wind power converter |
| CN101931240A (en) * | 2010-08-26 | 2010-12-29 | 哈尔滨九洲电气股份有限公司 | Double-PWM vector control double-fed wind power converter |
| CN102394498A (en) * | 2011-10-11 | 2012-03-28 | 国电联合动力技术有限公司 | Singlechip digital filtering device for voltage measurement of double-fed wind farm |
| CN102510092A (en) * | 2011-12-19 | 2012-06-20 | 国网电力科学研究院 | Distributed real-time control unit of wind power converter |
| CN102624016A (en) * | 2012-03-15 | 2012-08-01 | 华中科技大学 | Bidirectional energy flowing flow battery energy storage grid connection device and control method thereof |
| CN102624016B (en) * | 2012-03-15 | 2014-05-07 | 华中科技大学 | Bidirectional energy flowing flow battery energy storage grid connection device and control method thereof |
| CN102938565A (en) * | 2012-09-28 | 2013-02-20 | 上海交通大学 | Large-scale parallel system-based distributed communication system and control method thereof |
| CN103973130A (en) * | 2014-05-13 | 2014-08-06 | 上海电机学院 | Rectification and inversion module of doubly-fed converter of integrated structure |
| CN106253694A (en) * | 2015-06-03 | 2016-12-21 | 新能动力（北京）电气科技有限公司 | A kind of modular electric energy converting means |
| CN105429476A (en) * | 2015-11-20 | 2016-03-23 | 北京理工大学 | Multi-level switching linear composite piezoelectric ceramic driving power supply |
| CN105429476B (en) * | 2015-11-20 | 2018-01-30 | 北京理工大学 | A kind of linear compound piezoelectric ceramic driving power supply of more level switches |
| CN107872090A (en) * | 2016-09-27 | 2018-04-03 | 南京南瑞继保电气有限公司 | A kind of energy-storage battery pre-charge circuit and pre-charge method |
| CN107546741A (en) * | 2017-09-01 | 2018-01-05 | 中电普瑞科技有限公司 | A kind of low-voltage network power quality controlling device general purpose controller |
| CN108900079A (en) * | 2018-06-20 | 2018-11-27 | 湖南理工学院 | A kind of rapid transmission method of inverter and machine switching signal |
| CN108900079B (en) * | 2018-06-20 | 2022-03-22 | 湖南理工学院 | Quick transmission method for parallel operation switching signals of inverters |
| CN115833547A (en) * | 2023-02-08 | 2023-03-21 | 西南交通大学 | Decoupling circuit suitable for wide-band pulse load and control method |
| CN115833547B (en) * | 2023-02-08 | 2023-04-28 | 西南交通大学 | Decoupling circuit suitable for wide-band pulse load and control method |
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Open date: 20100609 |